/*
 *  generic_serial.h
 *
 *  Copyright (C) 1998 R.E.Wolff@BitWizard.nl
 *
 *  written for the SX serial driver.
 *     Contains the code that should be shared over all the serial drivers.
 *
 *  Version 0.1 -- December, 1998.
 */

#ifndef GENERIC_SERIAL_H
#define GENERIC_SERIAL_H

#ifdef __KERNEL__
#include <linux/mutex.h>
#include <linux/tty.h>

struct real_driver {
	void (*disable_tx_interrupts) (void *);
	void (*enable_tx_interrupts) (void *);
	void (*disable_rx_interrupts) (void *);
	void (*enable_rx_interrupts) (void *);
	void (*shutdown_port) (void *);
	int (*set_real_termios) (void *);
	int (*chars_in_buffer) (void *);
	void (*close) (void *);
	void (*hungup) (void *);
	void (*getserial) (void *, struct serial_struct * sp);
};

struct gs_port {
	int magic;
	struct tty_port port;
	unsigned char *xmit_buf;
	int xmit_head;
	int xmit_tail;
	int xmit_cnt;
	struct mutex port_write_mutex;
	unsigned long event;
	unsigned short closing_wait;
	int close_delay;
	struct real_driver *rd;
	int wakeup_chars;
	int baud_base;
	int baud;
	int custom_divisor;
	spinlock_t driver_lock;
};

#endif /* __KERNEL__ */

/* Flags */
/* Warning: serial.h defines some ASYNC_ flags, they say they are "only"
   used in serial.c, but they are also used in all other serial drivers. 
   Make sure they don't clash with these here... */
#define GS_TX_INTEN      0x00800000
#define GS_RX_INTEN      0x00400000
#define GS_ACTIVE        0x00200000

#define GS_TYPE_NORMAL   1

#define GS_DEBUG_FLUSH   0x00000001
#define GS_DEBUG_BTR     0x00000002
#define GS_DEBUG_TERMIOS 0x00000004
#define GS_DEBUG_STUFF   0x00000008
#define GS_DEBUG_CLOSE   0x00000010
#define GS_DEBUG_FLOW    0x00000020
#define GS_DEBUG_WRITE   0x00000040

#ifdef __KERNEL__
int gs_put_char(struct tty_struct *tty, unsigned char ch);
int gs_write(struct tty_struct *tty, const unsigned char *buf, int count);
int gs_write_room(struct tty_struct *tty);
int gs_chars_in_buffer(struct tty_struct *tty);
void gs_flush_buffer(struct tty_struct *tty);
void gs_flush_chars(struct tty_struct *tty);
void gs_stop(struct tty_struct *tty);
void gs_start(struct tty_struct *tty);
void gs_hangup(struct tty_struct *tty);
int gs_block_til_ready(void *port, struct file *filp);
void gs_close(struct tty_struct *tty, struct file *filp);
void gs_set_termios(struct tty_struct *tty, struct ktermios *old_termios);
int gs_init_port(struct gs_port *port);
int gs_setserial(struct gs_port *port, struct serial_struct __user * sp);
int gs_getserial(struct gs_port *port, struct serial_struct __user * sp);
void gs_got_break(struct gs_port *port);
#endif /* __KERNEL__ */
#endif
